The genuine XCMG 803422925 Floating Oil Seal is a premium OEM sealing solution designed for motor grader final drives, wheel hubs, and track roller frames. This heavy‑duty floating seal, identified by OEM number 803422925, prevents lubricant leakage and blocks contaminants like dirt, water, and abrasives from entering critical bearing compartments. Engineered from high‑grade cast iron with lapped sealing faces, the XCMG 803422925 delivers reliable performance under extreme pressure, vibration, and temperature fluctuations.
The 803422925 floating oil seal is used in XCMG GR135, GR165, GR180, GR215, GR260, GR300, and GR350 motor graders. It is installed in the final drive planetary hubs, pivot shaft seals, and articulation joint sealing packs. A worn or leaking floating seal leads to oil loss, bearing starvation, and premature component failure.
Replacing a damaged seal with genuine XCMG 803422925 restores oil‑tight integrity, reduces maintenance costs, and extends the service life of your grader’s undercarriage and drive train.
| Parameter | Specification |
|---|---|
| OEM Number | 803422925 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | Floating Oil Seal / Heavy‑Duty Mechanical Face Seal |
| Seal Type | Metal‑to‑metal lapped faces with rubber energizer (O‑ring) |
| Material – Seal Rings | Ductile cast iron (GGG40) or forged steel (option) |
| Material – Elastomer | Nitrile rubber (NBR) / High‑temperature HNBR (optional) |
| Outer Diameter (OD) | 152.0 mm ±0.2 mm |
| Inner Diameter (ID) | 112.0 mm ±0.2 mm |
| Axial Width (Uncompressed) | 18.0 mm ±0.3 mm |
| Face Flatness (Lapped) | ≤ 0.0006 mm (0.6 μm) – optical flat inspection |
| Surface Finish (Ra) | 0.1 – 0.2 μm (mirror finish) |
| Hardness (Seal Face) | 60‑65 HRC (through‑hardened) |
| Sealing Pressure (Max) | 0.5 MPa (5 bar) static / dynamic |
| Operating Temperature Range | -40°C to +120°C (NBR) / -30°C to +200°C (HNBR) |
| Max Peripheral Speed | 3.5 m/s (continuous) |
| Lubricant Compatibility | Mineral oils, synthetic gear oils, EP lubricants, water‑glycol fluids |
| Compatible Models | XCMG GR135, GR165, GR180, GR215, GR260, GR300, GR350 motor graders |
| Superseded Part Numbers | 803422800, 803422901, 803422988 |
The 803422925 floating oil seal is installed between rotating and stationary components in the final drive hub. It maintains a thin film of oil on the lapped faces, creating a hydrodynamic seal that prevents leakage while allowing relative motion.
Without a functioning floating seal, gear oil escapes, and abrasive particles enter the bearings. This leads to rapid wear, overheating, and eventual seizure of the final drive or wheel hub.
In XCMG GR graders, this seal also protects the articulation pivot bearings and the circle drive support bearings. Replacing a leaking seal with genuine 803422925 stops contamination and saves expensive housing replacements.
Each 803422925 floating seal undergoes a multi‑stage process: casting, rough machining, heat treatment, and final lapping. The sealing faces are lapped on precision rotary tables to achieve flatness within 0.0006 mm (0.6 microns).
The rubber energizer (O‑ring) is compression‑molded from NBR or HNBR, then 100% inspected for hardness and tensile strength. Each seal is tested for lip integrity and interference fit.
XCMG performs 24‑hour oil leak tests at 0.5 MPa and 80°C on sample batches. Only seals that pass zero leakage and face wear measurement are approved for OEM supply.
Before installation, clean the housing bore and shaft seat thoroughly. Inspect for burrs or scratches. Lubricate the rubber ring and housing chamfer with clean gear oil to prevent tearing.
Place the seal with the lapped faces facing each other (one stationary, one rotating). Use a dedicated press tool to push the seal evenly into the bore – never hammer directly on the seal ring.
After assembly, rotate the shaft by hand to verify smooth motion. Fill the hub with recommended oil and run the grader at idle, checking for leakage. Replace seals in pairs for even wear.
Visible oil drips from the hub end, oil stains on wheel rims, low gear oil level without external damage, and grinding noises from the final drive indicate seal failure.
Also, if the seal face shows deep scratches or the rubber energizer is hardened/cracked, replace immediately with genuine 803422925 to avoid catastrophic bearing failure.
XCMG recommends inspecting floating oil seals every 1,000 operating hours. Look for signs of oil seepage around the hub or pivot joint. Replace seals every 4,000‑6,000 hours or if leakage occurs.
For graders operating in mud, water, or sand, shorten replacement intervals to 2,500‑3,000 hours. Always replace the rubber ring and the metal seal rings as a set.
Use only genuine XCMG 803422925 seals – aftermarket seals often have poor flatness, causing immediate leaks. Keep spare seals in your service truck for quick field repairs.
Aftermarket floating seals often use soft cast iron that wears quickly or rubber rings that harden at low temperatures. Genuine XCMG 803422925 uses high‑chromium cast iron with 60+ HRC hardness and NBR/HNBR that remains flexible from -40°C to +120°C.
OEM seals are individually lapped and inspected for flatness; counterfeit products skip this process. A single leaky seal can destroy a final drive costing thousands of dollars.
XCMG provides a 12‑month warranty. Stocked in Houston, Rotterdam, Dubai, and Shanghai. Air freight 3‑7 days, emergency 24‑48 hour shipping. Order genuine 803422925 and protect your grader’s drivetrain.
Don’t let a failed floating oil seal strand your motor grader. The 803422925 seal is a low‑cost insurance policy against major final drive or wheel hub repairs. Keep spares on hand, inspect during every oil change, and replace proactively.
Upgrade to genuine XCMG quality – precision lapped faces, premium elastomers, and factory fit. Order the 803422925 Floating Oil Seal today and ensure your XCMG motor grader runs clean, dry, and productive for thousands of hours in the toughest grading conditions.
